The new release of Autodesk Simulation Moldflow allows users to configure their warp results to remove shrink automatically. This is a new feature, and will allow a large user base to get better results for windage predictions to determine mold cavity sizing.
It is broken down in such a way that specific shrink rates can be removed, depending on the compensation factor utilized. These compensation factors are;
- Automatic: An estimated shrinkage rate will be applied x, y, and z directions respectively
- Isotropic: The estimated shrinkage rate is supplied by the user and then applied to each of the x, y, and z directions
- Anisotropic: The estimated shrinkage rate is supplied by the user for each direction, and then applied individually to each direction
The source of these compensation factors (for isotropic and anisotropic) can be from several areas. They can be based off material data (in the material library, material data sheets from the supplier, etc.), as well as tested data or just a general rate to get a gauge of shrink influences to better understand what’s needed to reduce deflection.
The process is quite straight forward and provides a significant amount of information that can be utilized in determining tooling dimensions to understanding the shrink influence on the warpage.
1.) Run an analysis through Fill+Pack+Warp in Autodesk Simulation Moldflow Insight 2013
2.) Choose properties for the deflection plot in question, either a new plot or a default plot
3.) Navigate to the Deflection tab
4.) Choose the compensation option
5.) Enter the relevant estimated shrinkage and the coordinate system to use (Anisotropic only)
6.) Choose Apply then OK
This will now provide a representation of the deflection (in the direction you choose) with the removal of shrinkage dependent upon your configuration. This is a great tool, and can be utilized in both the pre and post processing stages of Moldflow simulation.
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